Foundry flask



w.' F. SCHULZ March 4 1924.

FOUNDRY FLASK wuantoz wfF. SGML. mi M5.. @me/131s Filed Sept. 9.

Patented ar. 4, 1924.

WALTER r. SCHULZ, or SHARON, PENNSYLVANIA, AssreNonTo. TRUsCON s'rnnfnlv` COMPANY, or YOUNGSTOWN, OHIO, A

CORPORATION ,OF'MICHIGAN p i roUNnRYgrLAsx.

p Application mea september 9.1922. seriai No. 537,041. Y

rlhe object of the invention is to provide' an improved form of flask member which is of double walled Construction whereby the outer sur'faceof the iask is maintained at a lower tempera-ture than would otherwise be possible and which possesses great strength and rigidity and is' particularly useful in the production of veryfrigid iiasks of large size but of comparatively shallow depth. With this object in view, the invention consists in the features of construction and arrangement hereinafter more fully 1described and 'clearly set forth in the' claims appended hereto.

A complete flask usually consists'ofv-two substantially similar kflask members, namely, a cope member and a drag member. For convenience of illustration, only one flask member has been illustrated in the accompanying drawings according -to one particular embodiment of the invention, and the description thereof is applicable to either flask member. V Y

In the accompanyingV drawing, Y' Figure 1 is a plan view of an improved flask member constructed `in accordance with the present invention, one-halfof the view being a section taken on the line I-I of Figure p Figure 2 is a side elevation of the flask member shown in Figure 1,

Figure 3 is an end elevation of this flask member, and

Figure 4 is an enlarged vcross-sectional view taken on the line IV-IV, Figure 1.

The iiask member comprises an outer Wall 1 and an inner wall 2 spaced therefrom and substantially parallel therewith. These walls in the particular flask member illus# trated are of rectangular configuration in plan, as clearly shown in Figure 1, although the vinventan' is not restricted'4 to this par-.i f

ticular shapeY or 1 'configuration jas; otherV shapes maybe employed. Eachof'fthese walls is preferably composed ofa plurality Of- `sectionsY which Yare suitabl joined Ytogether as, 'for' eXample,-"by welding the 'abuti ting-"ends of the sections.,V It isp'referable, particularly when the flask member y'isfof large zs'i'ze,'that the fjoints betweenth'elsections'of one' Wall should be'located a substantial distance Afrom the joints between the sections ofy the other wall. This is clearly indicated in Figure -1 in whichthe numeral et-indicates' the j ointsf-between the sections of the'outer wall and;A the vnumeral l indicates the join-ts between the sections ofY the inner wall. It willbe understood that the'middle portion*y of the flaskV as shown in -Figures 1 and 2fis` broken vaway Yfor conveniene-e of illustration-and .that the joint-S .3

and L1 in the side portionsA of the wallsa're spaced aparta materially greater distance in the actual figures.Y

They outerY wall V1 asshown :more clearly 'in Figure 4 is `of-'channel section comprising the web 5' and thel inwardly projecting flanges 6 and the inner wall 2'-is positioned construction than appears these 'K between the flangesr 6 in spaced relation? to l the web` 5 ofA- the wall 1. The upperfand lower edges of the wall 2may if desiredbe Y Welded tothe flanges 6 eithercontinuously or in spots, as indicated at7. A'Pr'eferably, the flanges Y6 extend beyondtheiniier'wall as indicated latl 8 to provide sand retaining ledges. n l

` Theinnerrwall 2 is held in spacedrelation to the outer wall -1`fby means vofY embossed or outwardly pressed portions 9 whichare shown ,of truncated conical formand the- Outer portions of which arexin engagement with the innersurface of' the Iweb 5. Where a plurality ofl row'sof these embossed portions 9 are provided' they are preferablyar'- ranged in staggered relation was 'clearly shownin the drawings. vThe embossed portions 9 of the inner wall may be secured rigidly'to the web of the outer Wall by suitable securingdevices such as rivets 10.

v The embossed portionsA 9 not only serve to hold the inner and outer walls-in spaced relation and to provide a place to fasten the two walls rigidly together but they also serve to provide a plurality of sand retaining pockets upon the inner surface of the inner wall. y

It will be understood that the double walled construction provided by the arrangement of the inner and outer walls in the manner described cannot bel distorted without the inner and outer walls moving with reference to one another and such relative movement is positively prevented not only by the rigid connection of the walls together but by the relative arrangement of these walls in the manner stated. The double walled construction, in addition to imparting great strength and rigidity to the flaskV member, 4also provides for the maintenance Yof the outer wall of the flask at av lower temperature than would otherwise be possible. e

The flask member illustrated is provided with lifting trunnions l1 which trunnions project through apertures in the outer wall l into engagement with the inner wall 2 and are Welded to both walls, thereby firmly securing these trunnions in place. The brackets 12 for vthe dowel pins or sockets therefor as usually provided, are also preferably passed through openings in the outer wall into engagement with the inner wall and welded to both walls so as to provide a secure and rigid connection for these brackets. j o Y It is to be understood that the invention is not restricted to the particular details of construction hereinbefore described as the same-,may be modified within the scope of the claims appended hereto.

What I claim and desire to secure by Letters Patent is:

1. A flask member, comprising an outer wall, and an inner wall substantially parallel to and spaced apart from said outer wall and rigidly secured thereto. 4 2. A flask member, comprising an outer wall, and an inner wall substantially parallel to andV spaced apart from said outer wall and having portions extending from the plane of the wall into engagement with said outer wall and rigidly connected therewith.

, 3. A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wall, and secured in place between the inwardly prujecting flanges thereof.

4. A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wall and positioned betweenv the inwardly projecting flanges thereof, and having portions extending into engagement with the Yweb of said outer` wall and secured thereto.

5. A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wally and positioned between and secured to the inwardly projecting flanges thereof.

6. A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wall and positioned between and welded to the inwardly nprojecting flanges thereof.

7 A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wall and positioned between and secured to the inwardly projecting flanges thereof, and having portions extending into engagement with the web of said outer wall and secured thereto.

8. A flask member, comprising an outer wall of channel cross-section having inwardly projecting flanges, and an inner wall spaced apart from said outer wall and positioned between the inwardly projecting flanges thereof, said inner wall having embossed portions engaging and secured to the outer wall and forming sand retaining pockets.

9. A flask member, comprising an inner wall and an outer wall, one of said walls being of channel cross-section andthe other being substantially planar and secured to the first wall to form an enclosed space between said walls. Y

10. A flask member, comprising an inner wall and an outer wall, one of said walls being of channel cross-section and theother bein ysubstantially planar and secured to the rst wall and fitting between the flanges thereof to form an enclosed space between said walls and flanges.

11. A flask member, comprising an inner wall and an outer wall, one of said walls being of channel cross-section and the other being substantially planar and secured to the first wall to form an enclosed space between said walls, one of said walls having embossed portions pressed out of the plane thereof and engaging the other wall to space said walls apart.

12. A flask member, comprising an inner wall and an outer wall, secured together in spaced relation, and substantially uniformly spaced apart throughout, and co-acting to form an enclosed space therebetween.

13. A flask member, comprising an inner wall and an outer wall, secured together in spaced relation, and co-acting to form an enclosed space therebetween, at least one of said walls having flanges at substantially right angles thereto and engaging the other wa l.

14:. A flask member, comprising an outer wall,A and an inner lwall secured thereto, at least one of said walls having numerous rela.-

tivel small embossed portions extending towar and in engagement with the other wall to hold said walls in substantially uniform spaced apart relation at all points.

l5. A flask member, comprising an outer Wall, and an inner substantially planar wall secured thereto, said inner wall having numerous relatively small embossed portions extending toward and in engagement with the outer wall to space said walls apart and to form sand retaining pockets.

16. A flask member, comprising an outer wall, and an inner Wall, at least one of said Walls having numerous relatively small embossed portions extending toward and in engagement with the other wall to space said Walls apart throughout the entire extent thereof and means securing said embossed portions to said other Wall.

17. A flask member, comprising an outer wall, an inner wall spaced apart from said outer wall, and lifting trunnions welded to both of said walls.

18. A ask member, comprising an outer wall, an inner wall spaced apart from said outer wall, and dowel pin brackets Welded to both of said walls.

19. A flask member, comprising an outer wall, and an inner wall spaced apart from said outer Wall, each of said walls comprising a plurality of sections joined together, with the joints of one wall located a substartial distance from the joints of the other wa Y f 20. A flask member, comprising an vouter non-corrugated Wall, and an inner non-colfrugated wall, said Walls being secured together in spaced apart relation at substantially all points to` provide a single enclosed space extending all Y around between said walls.

In testimonyl whereof I aiix my signature in presence of two witnesses.

WALTER F. SCHULZ.

Witnesses Y Y 

